Bearing for centrifugal extractors



J. B. SANDO BEARING FOR CENTRIFUGAL YEXT-RACTORS Sept. 21 ,1926.

Filed 11. 1920 2 Sheets-Sheet 2 A A'- i ulh Lu... -\-uv-lv( PatentedSept. 21, 1926.

UNITED STATES PATENT OFFICE.

JOSEPH B. SANDO, OF CINCINNATI, OHIO, ASSIGNOR TO THE AMERICAN LAUNDRYMACHINERY COMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

BEARING FOR CENTRIFUGAL EXTRACTORS.

Application filed December 11, 1920. Serial No. 429,975.

This invention relates to improvements in centrifugal extractors.

The objects of this invention are to provide means for limiting theoscillation of the rotating basket of the extractor; to provideautomatic means for cutting out the motor should the amplitude ofoscillation of the basket exceed a predetermined amount; and

furthermore to provide dynamic braking means for slowing down andstopping the motor upon being automatically cut out by excessiveoscillation of the basket.

Another object of this invention is to provide means for automaticallylubricating the spindle upon which the basket is mounted, the feeding ofthe lubricant being caused by the rotary motion of the spindle.

Other objects of this invention will be apparent from the followingdescription and claims when considered in connection with theaccompanying drawings.

Fig. l is a view of my invention partly in elevation and partly insection through the plane of line 1-l of Fig. 3; Fig. 2 is a diagram ofthe electrical wiring; Fig. 3 is a horizontal section through the planeof line 3-3 of Fig. 1; Fig. 4 is a horizontal section through theplane'of line 4-4 of Figs. 1 and 5; Fig. 5 is a vertical section showingin detail the bearing and other parts; and Fig. 6 is a section throughthe housing which ineloses the safety switch.

The curb 1 is supported within the uprights 2 which in turn support atthe top thereof the gimbal ring 3 upon which is rockably mounted theelectric motor 4 for operation of the spindle 5 through the motor shaft4 and the coupling 7 between the shaft and spindle. As will beunderstood, the motor is adapted to rock upon ring 3 in a plane at 90 tothe plane in which rocks the ring 3. Upon the lower end of the spindie 5is mounted the basket 6 which rotates within the curb 1 and carries thematerials 'to be dried. The lower end of the spindle 5 is provided witha bearing 5, the sleeve 8 and bushing 9 surrounding the lower end of thespindle within the bearing 5. Thrust buttons 10 are provided at thelower end of the spindle and a disk 11 having a recess portion 12 uponits upper face is fixedly secured in any suitable manner, as by bolting,to the bottom of the bearing 5*.

Sleeve 8 is formed with an inwardly extending flange at its lower endagainst which bears the lower end of the spindle 5. The flanged end ofsleeve 8 is provided with a diamond shaped aperture, as shown, toreceive the correspondingly shaped portion formed on the upper thrustbutton, thereby forming a lock. The same lock engagement is provided at7" between the lower thrust button and'the inwardly extending flange onthe lower end of the bearing 7. The bearing 5'" is adapted to oscillatewithin the limits of the concave plate 13 which is fixedly secured inany suitable manner, as for instance by bolting across the bottom of thecurb 1. An oil reservoir 14 is formed in the bearing 5 and hascommunication through the ports 15 with the recess 12 so that oil canfeed up through the thrust buttons 10 and thence between the sleeve 8and bushing 9, the oil which reaches the upper end of the sleeve 8 andbushing 9 finding its way into the annular cup 16 which is formed in theupper portion of the bearing 5*. The feeding of oil in the manner justdescribed is caused by the rotary motion of the spindle in its bearings.The oil received by the cup 16 will return through pipe 16 to thereservoir 14. A funnel valve 14 is provided for filling the reservoir14.

The bearing 5 is also formed with sockets 17 for cooperation with ballmembers 18 which are carried upon the inner ends of the bolts 19. Uponthe outer threaded ends of bolts 19 are mounted the adjusting nuts 20which form an abutment for the outer ends of the large and small springs21 and 22, respectively, the inner ends of which springs abut in eachcase against the end wall of the spring housing 23. The spring housings23 are mounted in any suitable manner upon the curb 1 and are providedwith caps 24 to close the outer ends of the same. The spring housingsand the caps therefor are in the present instance shown as being boltedto the curb by bolts 25. The caps 24 are centrally apertured at 26. Locknuts 27 are provided for the adjusting nuts 20.

As will be seen from Figs. 3 and 6 there is mounted in the outer end ofone oi the bolts 19 a. switch screw 28 which carries at its outer endthe plug member 29 for co-oporation with the safety switch indicated at30. The switch screw 28 has-screw thread engagement with the bolt 19 andhas a lock nut 31. The switch screw 28 extends out through the opening26 in the cap 2t and a housing 32 is provided upon the head of the capZl for convenient mounting and connection of the safety switch and theelectric connections thereto as indicated at 33 and 3t.

From the above description it will be seen that the springs :21 and 22can be set so as to limit the oscillation of the spindle by adjustingnuts 20 to approximately correspond to the amount of over-balance of theload in the basket. Such oscillation will in the present machine beordinarily taken up by r the springs, the condition of a given set ofsprings at a given moment, with respect to compression, depending uponthe direction of oscillation of the basket, as will be readilyunderstood. Should, however, the oscillation of the basket exceed thatfor which the springs, have been set, there will be caused an actuationofthe safety switch through the outward movement of the plug member 29into contact with the switch 30.

i The closing of the circuit at this point, as

will be seen later, causes the cutting out of the motor 4 and a dynamicbraking of the same so as to stop the machine.

Referring now to Fig. 2, the main line wires are indicated at 33 and 34,respectively, the closing switch at 35, the cut-out switch at 36, thedouble relay switch at 37, and the single relay switch at 38. Startingswitch 35 may be of any suitable type such as the well known motorstarting switch, arranged when closed to maintain itself in closedposition and to automatically open its own circuit at said switch whenits circuit is opened elsewhere. A line resistance is indicated. at 39,while the smaller resistance 40 is placed. in themotor circuit. From thediagram just referred to, it will be clear that upon closing the switch35 current will pass from the positive side of the line indicated at 33through the switches 35 and 36, thence through the coil 37 of the relayswitch 37, and thence out through the switch 38, which is normallyclosed, to the negative side of the line indicated at 34. Actuation ofthe switch 37 will effect the closin of the circuit through the contacts40 an thereby close the circuit through the motor 4. The machine is thusplaced in operation and will continue to operate until the switch 36 isopened by the o erator which will deenergize coil 37 an the circuitthrough the switch 37 and thereby cause a cutting out of the motor; oruntil the safet switch 30 is actuated in the manner above escribed so asto close the circuit through the coil of the switch 38 and thereby'causethe switch 38 to be opened. Such opening of either switch 37 or 38will'break the connection of the motor with the main line, leaving themotor in closed circuit with the resistance 40. As will be readilyunderstood, continued operation of the motor due to the momentum gainedthrough its positive operation while connected in the main line circuitwill cause it to operate as a generator against resistance 40 and togradually slow down and eventually come to a full stop.

Among the several advantages flowing from this invention are those whichmake it possible to limit the de ree of oscillation of the basket bysetting t e springs at a predetermined tension andalso to allow theautomatic cutting out and stopping of the motor in case the oscillationof the basket exceeds that for which the springs are set. Anotheradvantage resides in the automatic means for feeding the'oil forlubrication of the spindle.

Other advantages resulting from this invention will readily suggestthemselves to those who are familiar with the art to whiclr it relates.

\Vhat I claim is:

1. In an extractor, the combination of a curb, an overhung basket withinsaid curb and capable of oscillatory movement, means for rotating saidbasket, and means for automatically retarding the rotation of saidbasket when the amplitude of oscillatory movement of said basket exceedsa predetermined amount.

2. In an extractor, the combination of a curb, an overhung basket withinsaid curb. means for rotating said basket, means for limiting theoscillatory movement of said basket, and means for automaticallyretarding the rotation of. said basket when the amplitude of oscillatorymovement of said basket exceeds a predetermined amount.

3. In an extractor, the combination of a curb, an overhung basket withinsaid curb, means for rotating said basket, means for limiting theoscillatory movement of said basket, and electric means forautomatically retarding the rotation of said basket when the amplitudeof oscillatory movement of said basket exceeds a predetermined amount.at. In an extractor, a curb, an overhung basket within said curb, anelectric motor for rotating said basket, and means for automaticallybraking said motor when the amplitude of oscillator movement of saidbasket exceeds a predztermined amount.

5. In combination with a centrifugal extractor having a rotatablebasket, means for rotating the basket, and means controlled byoscillation of the basket for automatically stopping the extractor.

6. In combination with a centrifugal extractor having a rotatablebasket, means for rotating the basket, means tending to preventoscillation of said basket, and means controlled by oscillation of thebasket for automatically stopping the extractor.

7. In combination with a centrifugal extractor having a rotatablebasket, a motor for rotating the basket, and means controlled byoscillation of the basket for automatically short circuiting the motor.

8. In combination with a centrifugal extractor having a rotatablebasket, a motor for rotating the basket, and means controlled byoscillation of the basket for automatically short circuiting and brakingthe motor.

9. In an extractor, a curb, an oi erhung basket within said curb, anelectric motor for rotating said basket, and automatic means fordynamically braking said motor when the amplitude of oscillatorymovement of said basket exceeds a predetermined amount.

10. In an extractor, a curb, an over-hung basket Within said curb, anelectric motor for rotating said basket, means for limiting theoscillatory movement of said basket, and

means for automatically braking said motor when the amplitude ofoscillatory movement of said basket exceeds a predetermined amount.

11. In an extractor, a curb, an overhung basket within said curb, anelectric motor for rotating said basket, and electro-magnetic meanscontrolled by the oscillatory movement of the basket for dynamicallybrakin the motor.

12. n an extractor, the combination of a frame, an oscillatory basketrotatable in said frame, an electric motor for rotating said basket,circuits for saidmotor, and means governed by motion of said basket forcontrolling said circuits.

13. In an extractor, the combination of a frame, an oscillatory basketrotatable in said frame, an electric motor for rotating said basket,circuits for said motor, and means governed by oscillatory motion ofsaid basket for controlling said circuits.

14. An extractor, comprising a rotatable basket mountedfor oscillatorymovement, rotating means therefor, and means governed by the oscillatorymovement of said basket for limiting its speed of rotation.

15. An extractor, comprising a rotatable basket mounted for oscillatorymovement, rotating means, therefor, means for limiting oscillatorymovement of the basket, and braking means effective upon said basketwhen its oscillatory movement tends to exceed a predetermined amount.

16...,An extractor comprising a rotatable basket mounted for oscillatorymovement. rotating means therefor, means for limiting oscillatorymovement of the basket, and means governed by the oscillatory movementof said basket and adapted to control said basket when its oscillatorymovement tends to exceed a predetermined amount.

17. An extractor, comprising a rotatable -basket mounted for oscillatorymovement,

rotating means therefor, adjustable means for limiting oscillatorymovement of the basket, and braking means effective .upon said basketwhen its oscillatory movement tends to exceed a predetermined amount.

18. An extractor, comprising a rotatable basket mounted for rotatingmeans therefor, adjustable means for limiting oscillatory basket, andmeans'governed by the oscillatory movement of said basket and adapted tocontrol said basket when its oscillatory movement tends to exceed apredetermined amount.

In testimony whereof I hereby aflix my JOSEPH B. SANDO.

signature.

oscillatory movement,

movement of .the i

